Doorcheck



Dec. M, 1934.. R, C. SEYFORTH DOORCHECK Filed Oct. 5, 1933 2Sheets-Sheet 1 i 11v VENTOR 750 06 6 .6

z M A TTORNE Y8 Dec. 11, 1934.

R. C. 'SEYFORTH DOORGHECK Filed Oct. 5, 1933 2 Sheets-Sheet 2 INVENTOR2/776 C. Je7%f/z BY r a? ATTORNEYS Patented Dec. 11, 1934 I UNITEDSTATES 1,983,999 DOORCHECK Rome 0. Seyforth, Lowell, Mich.

Application October 5,

13 Claims.v

The main objects of this invention are:

First, to provide a door closing control device which permits the doorto be opened to any extent within the scope of swing of the door withoutaffecting the operation of the device.

Second, to provide a door closing device having the above advantages andcharacteristics which is very simple and economical in its parts andeasily installed.

Third, to provide a structure such as a dashpot adapted for use in thedoor closing combination above referred to or as a pump or the likehaving a cup-like plunger packing which is normally held in expandedposition when the plunger is at the outer end of its stroke.

Objects pertaining to details and economies of my invention willdefinitely appear from the description to follow. The invention isdefined in the claims.

A structure embodying the features of my invention is clearlyillustrated in the accompanying drawings, in which:

Fig. 1 is a fragmentary perspective View of a door closing deviceembodying the features of my invention.

Fig. 2 is a fragmentary view mainly in longitudinal section on line 2-2of Fig. 3.

Fig. 3 is a fragmentary view mainly invertical section on line 3--3 ofFig. 1.

Fig. 4. is a top plan view of the door closing device, the door and itsframe being shown in section with the door in closed position.

Fig. 5 is a view similar to Fig. 4, showing the door in open position. v

In the embodiment of my invention illustrated in the drawings thenumeral 1 indicates the door which is hinged to the door frame or casing3 at 2. The door casing bracket 4 is designed to be secured to the doorcasing or frame as to the stop 5 and is preferably a stamping havinghorizontal side flanges 6 and intermediate ears '7. The ears and flangesare provided with alined openings to receive the pin 8.

A swinging arm 9 is provided having an at taching bracket or plate 10provided with longitudinal slots 11 receiving the screws 12 by means ofwhich the plate is adjustably secured to the door. The attaching plateor bracketand the arm have'coacting hinge-like knucklesreceiving thepivot 13 for the arm. At its outer end the arm 9 is provided with alongitudinal slot 14, and terminates in knuckles 15 receiving the pin16.

An extensible compression link designated generally by the numeral 1'7extends between the door frame bracket and the swinging end of the 1933,Serial No. 692,261

arm 9, this link or member 17 being formed of the tubular section 18 anda section 19 telescoping therein. The section 19 is pivotally engagedwith thepin 8 between the ears '7 of the bracket while the section 18 ispivotally en- 5 gaged with the pin 16 between the pivot knuckles 15 ofthe swinging arm 9. The section 19 of the link has shoulders or stops 20with which the section 8 engages when the link is in its collapsedposition.

A dashpot comprising a cylinder 21 with coacting plunger 22 providedwith a plunger rod 23 is arranged in opposed relation to the com:pression link, the plunger rod 23 having a fiattened head 24 engagingthe pin 16. The tubular section of the compression link isslotted at 25to receive this head and permit a toggle movement of these parts. p

The cylinder 21 is provided with a flange 26 at its outer or head end,the flange having a hole 20 27 therein for receiving the attaching screw28. The connection is such as to permit a swinging movement of thedashpot cylinder.

The cylinder has a flared portion 29 at its head or outer end, the head30 having a flared 25 rim portion 31 disposed concentrically within thecylinder and providing an annular outwardly flared recess or socketreceiving the rim portion of the plunger packing 32, see Fig. 2. Thehead has a seam flange 33 at its outer end folded over 30 the end of thecylinder and suitably soldered thereto to provide a tight joint. Withthis provision the packing is expanded into this recess when the plungeris at the end of its in-stroke, thereby normally maintaining the packingin ex- 35 panded position so that when itis drawn into the cylinder onthe in-stroke of the plunger an effective sealing contact is had withthe cylinder walls,' and. this is maintained throughout the life of thepacking. This insures a much more effective sealing engagement of thepacking with the cylinder walls than is possible with the commonconstruction in which the packing is normally held in collapsed positionby the walls of the cylinder.

When it is in its outer position the plunger engages the head withinthepacking so that there is no strain on the packing. This avoids thenecessity for stops on the plunger rod. This feature of my invention ishighly desirable for use in pumps as well as dashpots.

"Tension springs 34 are disposed on opposite sides of the compressionmember 17, these springs having eyes at their ends engaged with the endsof the pins 8 and 16. Tension springs 35 are arranged on opposite sidesof the dashpots, the in ner ends of these springs being provided witheyes engaged with the pin 16, while the outer ends are secured to thedoor as by means of hooks 36. These springs may be omitted if desiredand other means applied to urge the door to closed position, forexample, spring hinges may be employed.

In operation the arm 9 acts to hold the pin 16 to which the parts areconnected as described away from the door and frame, regardless of howfar the door is swung open, and under such conditions the tensionsprings act to close the door. The closing of the door is checked andtimed by the dashpot. Fig. 5 illustrates the action of the arm 9 inholding the springs and other parts away from the door and door framewhen the door is swung widely open. The extensible compression linkcoacts with the dashpot to transmit forces to the door frame.

The plunger packing is always held in expanded position when the plungeris at the end of its inner stroke. The plunger abuts the inner end ofthe flange cylinder head which serves as a stop thereby eliminating thenecessity for a stop on the plunger rod and the packing is not deformedby coming in contact with the end of the cylinder.

I have illustrated and described my improvements in embodiments which Ihave found very practical. I have not attempted to illustrate ordescribe other embodiments or adaptations which I contemplate as it isbelieved this disclosure will enable those skilled in the art to embodyor adapt my improvements as may be desired.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is:

l. A device of the class described comprising in combination a doorcasing bracket having horizontal side flanges and intermediate spacedears, a pin disposed through said flanges and ears, a door bracketprovided with means for adjustably mounting upon a door, an arm slottedat its outer end pivotally mounted on said door bracket, a pin on theouter end of said arm, an expansible link comprising a pair oftelescoping members, one engaged with said pin on said door casingbracket between said ears and the other with said pin on said arm withinsaid slot thereof, tension springs connected to the ends of said pins, adashpot cylinder adapted for attachment to a door, a plunger coactingtherewith and provided with a plunger rod engaged with said pin on saidarm centrally thereof, and tension springs adapted for attachment to adoor and secured to the ends of said pin carried by said arm.

2. A device of the class described comprising in combination a doorcasing bracket, a pin on said bracket, a door bracket, an arm pivotally'mounted on said door bracket, a pin on the outer end of said arm, anexpansible link comprising a pair of telescoping members, one engagedwith said pin on said door casing bracket and the other with said pin onsaid arm, tension springs connected to the ends of said pins, a dashpotcylinder adapted for attachment to a door, a plunger coacting therewithand provided with a plunger rod engaged with said pin on said arm, andtension springs adapted for attachment to a door and secured to the endsof said pin carried by said arm.

3. In a door closing device, the combination of a door frame bracket, adashpot comprising a cylinder and coacting plunger provided with aplunger rod, the cylinder being adapted for attachment to a door, an armprovided with an attaching bracket on which the arm is pivotallymounted, the plunger rod being pivotally connected to the outer end ofthe arm, an extensible compression member pivotally connected to theouter end of the arm and to the frame bracket in opposed relation to theplunger rod, a pair of springs on opposite sides of the compressionmember connected to the outer end of the link and to the frame bracket,and a pair of springs on opposite sides of the dashpot connected to theouter end of the arm and adapted for connection to a door.

4. In a door closing device, the combination of a door frame bracket, adashpot comprising a cylinder and coacting plunger provided with aplunger rod, the cylinder being adapted for attachment to a door, an armprovided with an attaching bracket on which the arm is pivotallymounted, the plunger rod being pivotally connected to the outer end ofthe arm, and an extensible compression member pivotally connected to theouter end of the arm and to the frame bracket in opposed relation to theplunger rod.

5. In a door closing device, the combination of a door frame bracket, adashpot comprising a cylinder and coacting plunger provided with aplunger rod, the cylinder being adapted for attachment to a door, an armprovided with an attaching bracket on which the arm is'pivotallymounted, the bracket being longitudinally slotted to receive attachingscrews whereby it may be adjustably secured to a door, the plunger rodbeing pivotally connected to the outer end of the arm, and an extensiblecompression member pivotally connected to the outer end of the arm andto the frame bracket in opposed relation to the plunger rod.

6. A door closing device comprising in combination springs connectingthe door to its frame and acting to close the door when released afteropening, an arm hinged to the door and engaging said springs at its freeend for holding them away from the door and its frame regardless of howwide the door is opened, a door closing check having a cylinderconnected at its outer end to the door and provided with a plungerexpanding chamber, a plunger rod pivoted to said arm, and an extensiblecompression link pivotally connected at one end to the door frame and atthe other to said plunger rod and consisting of a tubular section and asection telescoped together.

'7. A door closing device comprising in combination, tension springsconnecting the door to its frame and acting to close the door whenreleased after opening, an arm hinged to the door and engaging saidsprings at its free end for holding them away from the door and itsframe regardless of how wide the door is opened, a door closing checkconnected at its outer end to the door and at its inner end to said arm,and an extensible compression link pivotally connected at one end to thedoor frame and at the other to the inner end of said check andconsisting of a tubular section and a section telescoped together.

8. A device of the class described comprising in combination a doorcasing bracket, a door bracket, an arm pivotally mounted on said doorbracket, an expansible link comprising a pair of telescoping members,one connected to said door casing bracket and the other to said arm, atension spring connected to said casing bracket and arm, a dashpotcylinder adapted for attachment to a door, a plunger coacting therewithand provided with a plunger rod connected to said arm, and a tensionspring adapted for attachment to a door and connected to said arm.

9. In a door closing device, the combination of a door frame or casingbracket, an arm provided with means for pivotal attachment to a door, adashpot comprising a cylinder and coacting plunger, one member of thedashpot being adapted for attachment to a door and the other beingattached to the swinging end of said arm, an extensible compressionmember comprising telescoping sections, one section being pivotallyconnected to the swinging end of the arm and the other to said framebracket in opposed relation to said dashpot, a spring connecting theswinging end of said arm to said door frame bracket, and a spring forconnecting said arm to a door.

10. In a door closing device, the combination of a door frame or casingbracket, an arm provided with means for pivotal attachment to a door, adashpot comprising a cylinder and coacting plunger, one member of thedashpot being adapted for attachment to a door and the other beingattached to the swinging end of said arm, and an extensible compressionmember comprisingtelescoping sections, one section being pivotallyconnected to the swinging end of the arm and the other to said framebracket in opposed relation to said dashpot.

11. The combination with a door frame and door, of a door closing devicecomprising a door closing spring, a dashpot, one member ofwhich isconnected to the door and the controlled element of which is connectedat its inner end to a swinging arm pivotally mounted on the door, and acompression member pivotally connected to the swinging end of said amand to the door frame and comprising a pair of telescopingly associatedmembers.

12. The combination with a door frame and door, of a door closing devicecomprising a door closing spring, an arm pivotally mounted on the door,a dashpot, one member of which is connected to the door and the other tosaid arm, and an extensible compression member disposed in opposedrelation to the dashpot and pivotally connected to the swinging end ofsaid arm and to the door frame.

13. In a door closing device, the combination of a door frame bracket,an arm provided with means for pivotal attachment to a door, a dashpotcomprising a cylinder flared at its outer end and adapted for attachmentto a door, a coacting plunger provided with a cup-like packing, aplunger rod for said plunger connected to the outer end of said arm, andan extensible compression member for connecting the outer end of saidswinging arm to a door frame disposed in opposed relation to saiddashpot.

ROME C. SEYFORTH.

